Figure 2
From: The Oceanic Biological Pump: Rapid carbon transfer to depth at Continental Margins during Winter
Temporal and spatial variability of oceanographic parameters and chlorophyll-a from daily data in both surface waters and within the BBL within Barkley Canyon. Parameters at sea surface are: (A) Bakun Upwelling Index from 48 N, 125°W; (B) Sea surface temperature; (C) Maximum wave height (B, C from South Brooks Buoy, Environment Canada); (D) chlorophyll-a concentration, derived from MODIS satellite data; Parameters in the BBL as measured by an IOV at 870-m depth are: (E) temperature with arrows indicating temperature rises associated with downslope flow, (F) chlorophyll-a concentration derived from fluorometer sensor; (G) Lateral fluxes of chlorophyll-a in the BBL (calculated via IOV data of flowmeter); (H) Satellite pictures of “Regime 3”14 showing phytoplankton pulses15 (1–7 marked in Fig. 2D) and the study site (blue circles). It is hypothesized to link the low chlorophyll concentrations in the BBL during autumn to stratification, when maximum grazer pressure and elevated SST prevented significant carbon fluxes (see also Supplementary Fig. 5).
